Thanks for mentioning the fonts. I try my best, but I'm not that great at designing. I'll revisit the fonts for my next update

Design is definitely not my strong point either :) Google's design pages[1] have been a big help to me, they call out specific things to do and not to do with Material design. I think they put it together in a way that can help engineers out.

[1] https://www.google.com/design/spec/style/typography.html#typ...

The app looks really useful and props on getting it out there. Another design related suggestion (especially for an app that features color so prominently) is to find a good color palette at a site like http://www.colourlovers.com/ and stick with that. No one should be picking their own colors in 2015 :)

I was aiming for colors to be a way to organize yours goals into categories and hopefully it isn't too invasive

At least keep the colors choice as an option if you do change it in any way! I am using it exactly as you said, to group like goals.

Edit: Plus it adds a little fun to it and makes it feel more personalized imo.